These files wont be able to be opened in blender, they are for XNA Lara, a free program that I use to adjust proportions and stance and then export to obj for Blender. Its awesome that you can open up the zip files. I have no idea why spyder and I can download but not open them.

When I use it for importing meshes, first I take the base mesh in Blender, delete everything except the actual editable mesh, and convert it into a static obj, or an fbx (that I convert into an obj with autodesk fbx convertor)

Then in XPS (XNA Posing Studio) I load the generic_mesh of the character I want to import, and the static obj of the base mesh. Then I pose and adjust the imported character to match the base mesh as much as possible, before exporting it as a static obj. This makes it easier to do the bone weight copy in Blender to rig the new mesh.

You explained it excellent. The truth is that I still can not use blender on my old computer, and how little I know it's out of pure curiosity.Is there any way to help you facilitate your import of characters?It helps you to look for some in some type of file or something else.Greetings and again thanks for your contributions